ls/vtec

i"M building an ls/vtec i have a 90 ls bottom wth a 2000 gsr head. I want to get new rods and pistons. What the highest compression i can run on reg. 87 pump gas. Also what rod and piston combo will give me this compression thanks.

Originally posted by blick2319@Nov 30 2003, 08:44 PM compression i can run on reg. 87 pump gas.

Click to expand...

there is no pistons that would be worth doing with a cr low enough for 87, i would never even run a stock b16 or gsr on 87 let alone anything built, on 91 you could go up to 12:5:1 with proper tunning, but a nice spot so you don't have to retard the timming to much is about 11:5...

ok so i'll run better octane. but i would still like to know what piston and rods i should run to get a good tunable compression in a 90 ls bottom with a 2000 gsr head. I dont' knwo how to calulate that he compression will be.
thankyou for your info though and please help me asap if u can answer this!

thanks and what rods? should i just use stock ls with arp bolts. I wasn't going to replace them but i dunno what kind of condition they r in and i dunno how much it would cost to see what condition they in by a shop so i thought maybe it would be cheaper to just buy new ones. Please tell me what u think